any of the following Expansion Packs: University, Island Paradise, Seasons, Pets and Into The future, Lemme know if there's stuff packs too. (Steam keys that weren't registered to EA's site) Most people don't register when they buy from steam.
paypal only but don't worry I'm a legit buyer. I'm new on this site but on hackforums I'm an old user with lots of positive feedback. Can link you my account if needed.